Re: Detroit 2-71 in HD5

2-71 is a low block engine , it has head gasket like other engines and does not use the fire rings and perimeter gasket like later 71 series. Liners have no orings as they are dry liners, only the 53 and 92 series use wet upper liners.

Those engines crack in the air box ,you have the symptoms.

Take the air box covers off and put some air pressure in the cooling system, you should see the water show in the air box.

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